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Chinese herbal medicine Xinfeng Capsule in treatment of rheumatoid arthritis: study protocol of a multicenter randomized controlled trial

Rheumatoid DisorderRheumatologyAutoimmune DiseaseStudy ProtocolTraditional Chinese MedicineHerbal MedicineRheumatic DiseasesPharmacologyHerb-drug InteractionInflammatory Rheumatic DiseaseMedicineRheumatoid ArthritisComplementary Medicine